Just to share my experience in case this happens to anybody else. In the attempt to unpair an old Apple Watch S0 from my phone I erroneously unpaired my current S3 LTE. When I realized it, I was quite annoyed because of the need to re-pair the watch etc, but what I did not expect was that my VZ cellular plan got deactivated as well in the moment the watch got un-paired. After I re-paired the watch I realized LTE was not working. I could still see the device number share in my VZ account but it was inactive. I could not reactivate it via the watch app pn the phone either. I had to call Verizon customer service and have them add it on their end and then re-run the activation in the watch app on the phone. One hour later all is running again. Good service experience through Verizon btw.